At a supermarket, the ratio of plums to apricots was 5 : 12. After Shiyun bought two-fifths of the apricots, there was a total of 549 plums and apricots left at the supermarket. How many fruits were there at first?
|
Plums |
Apricots |
Total |
Comparing plums and apricots at first |
5x5 = 25 u |
12x5 = 60 u |
85 u |
Before |
|
5x12 = 60 u |
|
Change |
|
- 2x12 = - 24 u |
|
After |
25 u |
3x12 = 36 u |
549 |
The number of apricots at first is repeated. Make the number of apricots at first the same. LCM of 12 and 5 is 60.
Total number of fruits left
= 25 u + 36 u
= 61 u
61 u = 549
1 u = 549 ÷ 61 = 9
Number of fruits at first
= 25 u + 60 u
= 85 u
= 85 x 9
= 765
Answer(s): 765